Shuffle a list

shuffle.ts

// Source: https://stackoverflow.com/a/2450976/6812545

const shuffle = <T>(array: T[]): T[] => {
  let currentIndex = array.length, randomIndex;

  // While there remain elements to shuffle.
  while (currentIndex != 0) {

    // Pick a remaining element.
    randomIndex = Math.floor(Math.random() * currentIndex);
    currentIndex--;

    // And swap it with the current element.
    [array[currentIndex], array[randomIndex]] = [
      array[randomIndex], array[currentIndex]];
  }

  return array;
}
  
// Used like so
const arr = [2, 11, 37, 42];
shuffle(arr);
console.log(arr);